CN102977488B - Polyphenylether fiber reinforced polystyrene composition and preparation method thereof - Google Patents

Polyphenylether fiber reinforced polystyrene composition and preparation method thereof Download PDF

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Publication number
CN102977488B
CN102977488B CN201210511753.XA CN201210511753A CN102977488B CN 102977488 B CN102977488 B CN 102977488B CN 201210511753 A CN201210511753 A CN 201210511753A CN 102977488 B CN102977488 B CN 102977488B
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polyphenylether
fibre
strengthens
polyphenylether fibre
fiber reinforced
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CN102977488A (en
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张世杰
程丽华
王平
童汉清
杨鑫莉
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Guangdong University of Petrochemical Technology
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Guangdong University of Petrochemical Technology
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/80—Component parts, details or accessories; Auxiliary operations
    • B29B7/88—Adding charges, i.e. additives
    • B29B7/90—Fillers or reinforcements, e.g. fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
    • B29B7/58—Component parts, details or accessories; Auxiliary operations
    • B29B7/72—Measuring, controlling or regulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/74—Mixing; Kneading using other mixers or combinations of mixers, e.g. of dissimilar mixers ; Plant
    • B29B7/7461—Combinations of dissimilar mixers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B9/00—Making granules
    • B29B9/12—Making granules characterised by structure or composition
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B9/00—Making granules
    • B29B9/12—Making granules characterised by structure or composition
    • B29B9/14—Making granules characterised by structure or composition fibre-reinforced
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/04—Particle-shaped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
    • B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/92—Measuring, controlling or regulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
    • B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
    • B29B7/38—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary
    • B29B7/46—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B9/00—Making granules
    • B29B9/02—Making granules by dividing preformed material
    • B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/92676—Weight
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92819—Location or phase of control
    • B29C2948/92828—Raw material handling or dosing, e.g. active hopper or feeding device

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

The invention discloses a polyphenylether fiber reinforced polystyrene composition and a preparation method of the polyphenylether fiber reinforced polystyrene composition. The polyphenylether fiber reinforced polystyrene composition comprises the following components by weight: 50 to 80 parts of polystyrene, 20 to 50 parts of polyphenylether fiber, and 0.5 to 1 part of antioxidant. The preparation method comprises the following steps in sequence: weighing raw materials by weight; feeding all the raw materials except the polyphenylether fiber into a mixer to mix in a dry way; feeding the mixed raw materials into a loading hopper of a twin-screw extruder; feeding the polyphenylether fiber through a fiber inlet; melting and extruding; and then pelleting to obtain the polyphenylether fiber reinforced polystyrene composition. Compared with the commonly-remarked polyphenylether fiber reinforced polystyrene composition, the polyphenylether fiber reinforced polystyrene composition disclosed by the invention has the advantages that the polyphenylether fibers and a polystyrene substrate can be completely combined, and no expensive toughening agent and coupling agent are needed. The polystyrene composition has remarkable advantages that the shock resistance can be greatly improved, the compatibility of components is high and the like.

Description

A kind of polyphenylether fibre strengthens polyphenylacetylene combination and preparation method thereof
Technical field
The present invention relates to technical field of polymer materials, relate in particular to a kind of polyphenylether fibre and strengthen polyphenylacetylene combination and preparation method thereof.
Background technology
Polystyrene (PS) is very important plastics variety, and annual production (comprising modified product) occupy plastic industry prostatitis.But owing to being connected with phenyl ring side group on its macromolecular chain, cause chain structure irregularity, molecular chain is too firm, makes polystyrene be difficult for crystallization, it is a kind of hard and crisp macromolecular material.Although polystyrene has higher stretching, bending property, shock resistance is poor, and thermotolerance is not high simultaneously, and the highest continuous use temperature is lower than 80 DEG C.For above performance deficiency, industry member mainly adopts the method for blend and graft copolymerization, and p-poly-phenyl ethene carries out toughening modifying, and common polystyrene is modified product in the market.Although the toughness of polystyrene obviously improves after modification, rigidity, stretching, bending property obviously reduce.If adopt glass fibre p-poly-phenyl ethene to strengthen, because two kinds of group partition inter-capacitives are poor, therefore modified effect neither be ideal.
Comparatively speaking, macromolecular fibre is similar because of chemical constitution, and between resin matrix, has good consistency.But there is not strengthening with macromolecular fibre the research report of polystyrene material at present.Macromolecular fibre common on market uses mainly as textile raw material.The main preparation methods of macromolecular fibre comprises melt spinning method and solution spinning.And solution spinning is according to becoming different two types of dry method and the wet-spinnings that are divided into of silk principle.At present nylon fiber (Chinese invention patent CN 101139748 B), polyster fibre (Chinese invention patent CN 1304653 C) mainly adopt melt spinning method to produce, and spandex fibre (Chinese invention patent CN 102154729 B), cellulosic fibre (Chinese invention patent CN 1180142 C), polyvinyl alcohol fiber (Chinese invention patent CN 1253616 C) mainly adopt solution spinning to produce.Polyphenyl ether material, because fluidity of molten is very poor, is not suitable for melt-spinning, so can only use solution spinning to be prepared into fiber.
Summary of the invention
The object of the invention is to overcome prior art above shortcomings, provide a kind of polyphenylether fibre to strengthen polyphenylacetylene combination and preparation method thereof.
For solving the problems of the technologies described above, the object of the invention is to be achieved through the following technical solutions.
A kind of polyphenylether fibre strengthens polyphenylacetylene combination, in parts by weight, comprises following component:
Polystyrene 50-80;
Polyphenylether fibre 20-50;
Oxidation inhibitor 0.5-1.
Further optimize, described polystyrene is cinnamic homopolymer, does not pass through the toughness reinforcing processing of blend or graft copolymerization.
Further optimize, described polyphenylether fibre is prepared and obtained by following technique: polyphenylene oxide resin is dissolved in and in dimethylbenzene, makes spinning solution, and apparent viscosity is 3200-8000 poise at 60 DEG C.Adopt the method for dry-spinning to make polyphenylether fibre spinning solution.Dry-spinning process: selected 230 DEG C of spinning nozzle temperature, spinning speed is 550-650m/min, the linear density of fiber is 100-500 dtex.
Further optimize, described oxidation inhibitor is antioxidant 1010 or oxidation inhibitor 245.Described antioxidant 1010 is four (β-(3,5-di-t-butyl-4-hydroxy phenyl) propionic acid) pentaerythritol ester, and described oxidation inhibitor 245 is triglycol-bis--(the 3-(3-tertiary butyl-4-base-5-methylbenzene)) propionic acid acid esters.
Further optimize, described component also comprises other auxiliary agent of 0-3 part; Described other auxiliary agents are lubricant (as calcium stearate, stearic acid etc.) or toner.
Above-mentioned polyphenylether fibre strengthens the preparation method of polyphenylacetylene combination, and it comprises step:
(1) take raw material by described parts by weight, the raw material except polyphenylether fibre is put in mixing tank and is dry mixed;
(2) raw material mixing in (1) is put into the loading hopper of twin screw extruder, described polyphenylether fibre adds by adding fine mouthful, and through melt extruding, granulation makes described polyphenylether fibre and strengthens polyphenylacetylene combination.
Further optimize the described twin screw extruder Yi of step (2) district temperature 160-170 DEG C, two district temperature 190-220 DEG C, three district temperature 200-230 DEG C, four district temperature 200-220 DEG C, head temperature is 200-220 DEG C, the residence time 2～3min, pressure is 9-16MPa.
Further optimize, being dry mixed the time described in step (1) is 3～5min.
Further optimize, described in be dry mixed and adopt SHR series of high speed mixing tank, 300～900 revs/min of the speeds of mainshaft.
Owing to adopting above technical scheme, the present invention compared with prior art has the following advantages and beneficial effect:
Polyphenylene oxide is a kind of high performance engineering plastics, because its molecular chain structure is similar to polystyrene, so have very good consistency between the two, can realize arbitrary proportion miscible.Compared with glass fibre, between polyphenylether fibre and polystyrene resin, bonding force is stronger, disperses more evenly, and the shock resistance of polyphenylacetylene combination is significantly promoted.In formula, need not add toughner and coupling agent simultaneously, can reduce costs.Because the melt temperature of polyphenylene oxide is higher than 220 DEG C, so polyphenylether fibre exists with solid state all the time in preparation method of the present invention, can add in forcing machine by adding fine mouthful, operation is very easy.
Embodiment
Polyphenylether fibre in present embodiment strengthens polyphenylacetylene combination preparation method and comprises, a: take by weight ratio polystyrene and other raw material (except polyphenylether fibre); B: the starting material that weigh up are put in SHR series of high speed mixing tank and are dry mixed 3～5min, 300～900 revs/min of the speeds of mainshaft; C: the raw material mixing in b is put into the loading hopper of twin screw extruder, through melt extruding, granulation.Complete processing is as follows: twin screw extruder one district temperature 160-170 DEG C, two district temperature 190-220 DEG C, three district temperature 200-230 DEG C, four district temperature 200-220 DEG C, head 200-220 DEG C, polyphenylether fibre adds by adding fine mouthful, the residence time 2～3min, pressure is 9-16MPa.
For ease of the present invention is further understood, now describe the present invention in conjunction with specific embodiments:
Embodiment 1:
Take by weight 78 parts of PS, 0.5 part of antioxidant 1010,1.5 parts of calcium stearates.The material mixing is joined in the hopper of twin screw extruder ,polyphenylether fibre adds by adding fine mouthful, controls 20 parts of fibre contents, mixes 3 minutes, and through melt blending, extruding pelletization becomes matrix material.Wherein, the temperature setting of the each heating region of screw rod is respectively: district's temperature: 160 DEG C; 2nd district: 220 DEG C; 3rd district: 230 DEG C; 4th district: 220 DEG C; Head: 220 DEG C; Residence time 3min.Pressure is 10MPa.
Embodiment 2:
Take by weight 53 parts of PS, 0.5 part of antioxidant 1010,1.5 parts of calcium stearates.The material mixing is joined in the hopper of twin screw extruder ,polyphenylether fibre adds by adding fine mouthful, controls 45 parts of fibre contents, mixes 5 minutes, and through melt blending, extruding pelletization becomes matrix material.Wherein, the temperature setting of the each heating region of screw rod is respectively: district's temperature: 160 DEG C; 2nd district: 220 DEG C; 3rd district: 230 DEG C; 4th district: 220 DEG C; Head: 220 DEG C; Residence time 2min.Pressure is 12MPa.
Embodiment 3:
Take by weight 48 parts of PS, 0.5 part of antioxidant 1010,1.5 parts of calcium stearates.The material mixing is joined in the hopper of twin screw extruder ,polyphenylether fibre adds by adding fine mouthful, controls 50 parts of fibre contents, mixes 5 minutes, and through melt blending, extruding pelletization becomes matrix material.Wherein, the temperature setting of the each heating region of screw rod is respectively: district's temperature: 160 DEG C; 2nd district: 220 DEG C; 3rd district: 230 DEG C; 4th district: 220 DEG C; Head: 220 DEG C; Residence time 3min.Pressure is 13MPa.
Comparative example 1:
Take by weight 73.5 parts of PS, 3 parts of polystyrene graft maleic anhydrides, 1.5 parts of silane resin acceptor kh-550s, 0.5 part of antioxidant 1010,1.5 parts of calcium stearates.The material mixing is joined in the hopper of twin screw extruder ,glass fibre adds by adding fine mouthful, controls 20 parts of fibre contents, mixes 3 minutes, and through melt blending, extruding pelletization becomes matrix material.Wherein, the temperature setting of the each heating region of screw rod is respectively: district's temperature: 160 DEG C; 2nd district: 220 DEG C; 3rd district: 230 DEG C; 4th district: 220 DEG C; Head: 220 DEG C; Residence time 3min.Pressure is 9MPa.
Comparative example 2:
Take by weight 48.5 parts of PS, 3 parts of polystyrene graft maleic anhydrides, 1.5 parts of silane resin acceptor kh-550s, 0.5 part of antioxidant 1010,1.5 parts of calcium stearates.The material mixing is joined in the hopper of twin screw extruder ,glass fibre adds by adding fine mouthful, controls 45 parts of fibre contents, mixes 5 minutes, and through melt blending, extruding pelletization becomes matrix material.Wherein, the temperature setting of the each heating region of screw rod is respectively: district's temperature: 160 DEG C; 2nd district: 220 DEG C; 3rd district: 230 DEG C; 4th district: 220 DEG C; Head: 220 DEG C; Residence time 3min.Pressure is 12MPa.
Performance test:
Tensile strength is tested by GB/T 1040 standards.Specimen types is I type, and batten size (mm): 170(is long) × (20 ± 0.2) (end width) × (4 ± 0.2) (thickness), draw speed is 50 mm/min;
Flexural strength and modulus in flexure are tested by GB/T 9341 standards.Specimen types is specimen size (mm): (80 ± 2) × (10 ± 0.2) × (4 ± 0.2), and rate of bending is 20 mm/min;
Notched Izod impact strength is tested by GB/T 1043 standards.Specimen types is I type, specimen size (mm): (80 ± 2) × (10 ± 0.2) × (4 ± 0.2); Breach type is category-A, and breach residual thickness is 3.2 mm.
The formula of embodiment 1 ~ 3 and material property are in table 1:
Table 1
The formula of comparative example 1 ~ 2 and material property are in table 2:
Table 2
? 1# 2#
PS 73.5 48.5
Polystyrene graft maleic anhydride 3 3
Glass fibre 20 45
KH-550 1.5 1.5
Antioxidant 1010 0.5 0.5
Calcium stearate 1.5 1.5
Tensile strength (MPa) 96 135
Flexural strength (MPa) 206 294
Modulus in flexure (GPa) 4.9 6.3
Notched Izod impact strength (KJ/m 2） 12.4 17.0
Can find out from above embodiment and comparative example performance, it is a kind of composition system with superpower shock resistance, high strength, high rigidity that polyphenylether fibre of the present invention strengthens polyphenylacetylene combination system.Compare with metal fiber reinforced polystyrene material with common glass fibre, polyphenylether fibre strengthens polyphenylacetylene combination and is more applicable to being applied to the field such as Aeronautics and Astronautics, navigation.
Above a kind of polyphenylether fibre provided by the present invention being strengthened to polyphenylacetylene combination and preparation method thereof is described in detail, applied specific case herein principle of the present invention and embodiment are set forth, the explanation of above embodiment is just for helping to understand method of the present invention and core concept thereof; , for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention meanwhile.

Claims (7)

1. polyphenylether fibre strengthens a polyphenylacetylene combination, it is characterized in that in parts by weight, comprises following component:
Polystyrene 50-80;
Polyphenylether fibre 20-50;
Oxidation inhibitor 0.5-1;
Described polyphenylether fibre is prepared and obtained by following technique: polyphenylene oxide resin is dissolved in and in dimethylbenzene, makes spinning solution, and apparent viscosity is 3200-8000 poise at 60 DEG C; Adopt the method for dry-spinning to make polyphenylether fibre spinning solution; Dry-spinning process condition is: 230 DEG C of spinning nozzle temperature, and spinning speed is 550-650m/min, the linear density of fiber is 100-500 dtex.
2. polyphenylether fibre as claimed in claim 1 strengthens polyphenylacetylene combination, it is characterized in that: described polystyrene is cinnamic homopolymer, does not pass through the toughness reinforcing processing of blend or graft copolymerization.
3. polyphenylether fibre as claimed in claim 1 strengthens polyphenylacetylene combination, it is characterized in that: described oxidation inhibitor is antioxidant 1010 or oxidation inhibitor 245.
4. polyphenylether fibre as claimed in claim 1 strengthens polyphenylacetylene combination, it is characterized in that: described component also comprises other auxiliary agent of 0-3 part; Described other auxiliary agents are lubricant or toner.
5. prepare the method that polyphenylether fibre described in claim 1 strengthens polyphenylacetylene combination, it is characterized in that, comprise step:
(1) take raw material by described parts by weight, the raw material except polyphenylether fibre is put in mixing tank and is dry mixed;
(2) raw material mixing in (1) is put into the loading hopper of twin screw extruder, described polyphenylether fibre adds by adding fine mouthful, and through melt extruding, granulation makes described polyphenylether fibre and strengthens polyphenylacetylene combination.
6. preparation method as claimed in claim 5, it is characterized in that the described twin screw extruder Yi of step (2) district temperature 160-170 DEG C, two district temperature 190-220 DEG C, three district temperature 200-230 DEG C, four district temperature 200-220 DEG C, head temperature is 200-220 DEG C, and raw material is the residence time 2～3min in forcing machine, and pressure is 9-16MPa.
7. preparation method as claimed in claim 5, is characterized in that being dry mixed the time described in step (1) is 3～5min.
CN201210511753.XA 2012-12-04 2012-12-04 Polyphenylether fiber reinforced polystyrene composition and preparation method thereof Active CN102977488B (en)

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CN1460534A (en) * 2003-05-28 2003-12-10 东南大学 Nano fibre protective filtering material and its preparation method
CN102706219A (en) * 2012-06-06 2012-10-03 中国科学院化学研究所 Micron and nano material-enhancing bionic layered composite material and manufacturing method thereof

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US20080217241A1 (en) * 2007-03-05 2008-09-11 Alan Smithies Composite filter media and methods of manufacture

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Publication number Priority date Publication date Assignee Title
CN1460534A (en) * 2003-05-28 2003-12-10 东南大学 Nano fibre protective filtering material and its preparation method
CN102706219A (en) * 2012-06-06 2012-10-03 中国科学院化学研究所 Micron and nano material-enhancing bionic layered composite material and manufacturing method thereof

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